Mondadori has released this month in Spanish the latest book by Johan Theorin in his Öland Quartet, El guardián de niños, translated by Carlos del Valle Hernández, original title: Sankta Psyko. You can find a review in English at Swedish Book Review. My mistake, sorry. This book is not set in Öland. Therefore it is not the fourth instalment in The Öland Quartet.
A Crime is Afoot 